CSV deduplicatorFormatters

CSV deduplicator. Remove duplicate rows in seconds.

Paste or upload a CSV, choose the columns that make a row a duplicate, such as email, and download the clean file plus the removed rows. The file never leaves your browser.

Cost to you

Free

Runs in your browser. No signup, no API call, no limit per hour.

browser
runs in
none
API calls
none
account

Use it now

Use the CSV deduplicator here

It runs in your browser. Nothing you type is sent anywhere, there is no signup and no limit.

Loading the tool.

Run it from your agent

Copy one prompt, give it to your agent.

Fill in the placeholder, paste it, and the agent runs the same job with current data on your looot account and shows the cost.

  • You give it: a csv file or pasted csv text.
  • Billed per call, nothing while your agent is idle.
  • The agent shows the price before it calls.
Prompt: CSV deduplicator
Use looot to clean this lead list: [attach or paste the CSV]. 1. Set up https://looot.ai/skill.md. 2. Remove rows with the same email, ignoring case and spaces, and keep the first one. 3. Search the catalog for an email verification endpoint, check its price, and verify the remaining addresses. 4. Return the clean CSV with a verdict column and the total cost.

Give this to your agent
Setup command
set up looot for CSV deduplicator - https://looot.ai/free-tools/csv-deduplicator/skill.md

What comes back

What your agent gets from remove duplicates csv

Field names as the providers return them. The exact set varies by endpoint, and your agent reads it from the catalog.

  • the clean CSV without duplicates
  • number of rows kept and removed
  • the removed rows as their own CSV

Providers

Who can do this job today

Your agent picks the endpoint. These providers offer one right now, with the live price of their cheapest.

Use it for

What people do with remove duplicates csv

  • Merge lead lists

    Join exports from two tools and keep one row per email.

  • Protect a campaign

    Stop the same person from getting your email twice.

  • Fix a CRM import

    Remove repeated rows before an import creates duplicate contacts.

  • See what was removed

    Download the removed rows and check that nothing important went.

Set up once

Three steps. Your agent does the rest.

Keep going

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FAQ

Questions about remove duplicates csv

Paste the CSV or upload the file above, tick the columns that define a duplicate, and download the clean file. The first row of each duplicate group is kept unless you choose the last.

No. The file is read and cleaned in your browser. Nothing is sent to a server, so it works for private lists too.

Yes. Tick only the email column. When a column named email exists, it is picked for you.

Yes, when ignore case is on, which is the default. Spaces at the start and end of a cell are ignored too.

Commas, semicolons and tabs. It picks the one your file uses, and you can change it. Quoted cells with commas or line breaks inside are read correctly.

Files up to 20 MB. Everything runs in your browser, so a very large file takes longer on a slow device.

Yes. No account, no limit and no API call.
For agents
tool
CSV deduplicator
category
Formatters
input
A CSV file or pasted CSV text
output
the clean CSV without duplicates, number of rows kept and removed, the removed rows as their own CSV
endpoint
tomba: tomba-email-verifier
price
per call, read live from the catalog on the web page
web tool
runs in the visitor's browser, no API call, free and unlimited
schedule
on demand
setup
https://looot.ai/free-tools/csv-deduplicator/skill.md
llms.txt
https://looot.ai/llms.txt
updated
2026-10-14
markdown /free-tools/csv-deduplicator.md

Run remove duplicates csv from your own agent.

Start your workspace, top up, and paste the prompt into the agent you already use. It runs the job with live data and shows the cost first.

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